GUN can you change the HK USP Compact 9mm to .40?

Discussion in 'On Topic' started by HardTech, Apr 28, 2006.

  1. HardTech

    HardTech hungry

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    It seems the physical dimensions of both guns are the same... what would be required to shoot .40 out of a USP9c?
     
  2. PUREVIL

    PUREVIL More Money Than Brains Croo

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    I'd say barrel and maybe a mag, but I'd wait for more experienced HK crew to chime in. Im a noob to H&K crew.
     
  3. CString

    CString New Member

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    :dunno: generally you can only change guns from a higher caliber to a smaller caliber. or maybe i'm making this up too. :dunno:
     
  4. HardTech

    HardTech hungry

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    aren't there guns out there that can shoot a different caliber if you just change out the slide and/or mag?
     
  5. PUREVIL

    PUREVIL More Money Than Brains Croo

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    Well with my desert eagle I can swap from .44 mag to .50 with just a barrel and mag. The 44 and 50 use the same bolt assembly. But Magnum reseach adverts the fact its switchable I dont see any other companies do that.
     
  6. Dsking85

    Dsking85 New Member

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    iiiiii don't think so.

    wouldn't the hole for the barrel in the slide be smaller?
     
  7. fintheman

    fintheman I will ebay O/T!

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    From everything I've been learning with HK pistols as of late, no.

    The only thing I've seen with the USP's that you can do is take a .40 to a .357
     
  8. Dsking85

    Dsking85 New Member

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    i'm lookin at my USP 9mm and it will not work. a .40 round will not fit into the slide, and the extractor can't hold it.
     
  9. PUREVIL

    PUREVIL More Money Than Brains Croo

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    well there is the answer.
     
  10. HardTech

    HardTech hungry

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    great

    now the question is, 9mm or .40
     
  11. Dsking85

    Dsking85 New Member

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    :dunno: depends what you prefer. why not a USPC .45? they do hold 11 rounds of .45acp. pretty good for a self defense gun.
     
  12. Bdog

    Bdog ...but do I really care?

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    If you do anything to an H&K you will void the warrenty and any liability on their part. They are the hardest company to deal with if you don't have a large government contract. I asked them about placing a .357 Sig barrel in my .40 USP Compact and they said the warranty will be voided and no service could be performed on that gun... I sold it and got a G22!
     
  13. HardTech

    HardTech hungry

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    From what I read, the USPc .45 can only hold 8 rounds. I'd like to get the USP .45 full a little later, though

    I want good stopping power and something without too much recoil. Is the recoil difference that great between the 9mm and .40? I understand 9mm is a whole helluva lot cheaper than .40, but if price is a concern I can always use reloads.
     
  14. Dsking85

    Dsking85 New Member

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    9mm is cheaper. .40 has snappier recoil, but it shouldn't matter that much. it'll still get back on target easily. .40 will have more stopping power obviously, but if you get good ammo for 9mm it'd be just fine. i just bought a sig 229 in .40, but if i didn't already have a USP in 9mm, i would have gotten a 9mm. if you don't already have one i'd just go for the 9
     
  15. HardTech

    HardTech hungry

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    I've yet to shoot either gun, so I'll reserve judgment until I put a few rounds through each
     
  16. silversilvia

    silversilvia OT Supporter

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    i know for a beretta u can go from .40 to 9mm with just a barrel and mag. might not eject as strong. but u cannot go from a .40 to 9mm with just a barrel since the bullet won't seat properly in the 9mm slide. so i would say maybe no. also the feed ramp might not feed reliably going to a bigger bullet
     
  17. Gimik

    Gimik New Member

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    You could probably go from .40 to 9mm, but I doubt you can go the other way.

    The USPc.45 holds 8+1. The USPf.45 holds 12+1. I love the compact though. Well, I love all USPs really.
     

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